The invention discloses a method for controlling multichannel sound distributing and switching of a vehicle-mounted terminal. A
software sound mixer comprising a six-path input sound channel and a four-path output sound channel is arranged in the vehicle-mounted terminal; after audio signals of input video accompanying sounds, terminal
station reporting sounds and terminal local prompting sounds are mixed through the
software sound mixer, the video accompanying sounds and the terminal
station reporting sounds are implanted on a left sound channel and a right sound channel of an
HDMI signal and played through an audio / video playing device; the terminal local prompting sounds are output to a terminal local power
amplifier via another two sound channels, and voice distribution on the vehicle-mounted terminal is achieved; when one video accompanying sound or terminal
station reporting sound is played, volume of other audio signals decreases by controlling the
software sound mixer and the implantation of and the
HDMI or implantation is stopped and recovers the original state after the video accompanying sound or terminal station reporting sound is played, and switching control is achieved. By means of the method, one device can have the function of playing various sounds, and a
sound system in the vehicle can be controlled to play various paths of different sounds.